[Ips-dhfpr] ASWFC Daily HF Prop Report - 23 March 25 issued 2330 UT on 23 Mar 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/23 MARCH 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (23 MARCH) 
Date   T index  Conditions    
23 Mar   133    Fair-normal    

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 15% during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Enhanced 30% early in UT day then near predicted monthly values.
   Southern Australian Region:
      Enhanced 30% early in UT day then near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 35% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Feb      127
Mar      117
Apr      114


2. FORECAST (24 MARCH - 26 MARCH)
Date   T index  Conditions       MUFs                              
24 Mar   125    Normal           Near predicted monthly values
25 Mar   125    Normal           Near predicted monthly values    
26 Mar   125    Normal           Near predicted monthly values   

COMMENT: ASWFC Preliminary HF Communications Warning 30 was issued 
on 23 March and is current for 23-24 Mar. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 23-Mar were near predicted 
values to 30% enhanced 23/0000-0300UT. Spread-F was observed 
in Hobart during local night hours. An anticipated CME arrival 
has failed to eventuate. MUFs are expected to be near predicted 
values 24-26 Mar.

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For an explanation of some of the terms in this report, go to
https://www.sws.bom.gov.au, and follow links to Educational->
Glossary on Solar Terrestrial Terms.

Australian Space Weather Forecasting Centre
Bureau of Meteorology
ASWFC at bom.gov.au
www.bom.gov.au | www.sws.bom.gov.au